Electric switch.



J. F. BURNS.

ELECTRIC SWITCH.

APPLICATION FILED uov.10.191s.

Patented July 18, 1916.

2 SHEETS-SHEET 1 Ina/m J. F. BURNS.

ELECTRIC SWITCH. APPLICATION. FILED NOV. 10. 1915.

1, 1 91 92%. Patented Jul 1916.

2 SHEETS- 2.

UNITED STATES JAMES F. BURNS, F PHILADELPHIA, PENNSYLVANIA.

. I ELECTRIC swrrcrr,

sp fi of ec e t. Patented July 18, 1916.

Application filed November 10, 1915. Serial No. 69,740.

To all whom it may concern: Be it lmown that I, JAMEs 'F.

citizen of the United States, residing in Philadelphia, Pennsylvania, have inventedcertain Improvements in Electric Switches,

of which the following is 'a specification.

My invention relates to electrical switches, and more-particularly to inclosed switches, in which the switch mechanism is inclosed within a .box or casing, with provision for operating the switch from the outside without opening the box.

The common knife-switch as ordinarily used in exposed switches, is constructed and mounted in such a manner that a downward or outward pull upon the operating handle will open the switch and an upward or inward push will close it.

One object of my -'nvention is to provide an inclosedswch operable by the same general character of motionsto which the operator is accustomed with exposed switches.

Another object is to provide the inclosed switch with external operating means of such character as will enable the o erator readily to-determine the limits of e full opening and closing motions.

In the accompanying drawings :--Figure 1 is a sectional view of. an inclosed switch embodying my invention, the switch being closed; Fig. 2 is a similar'view with the switch shown in open'position; Fig. 3 is a perspective view; and Fig. 4 is a plan view with the cover thrown. back and partly broken away, and with the switch closed. In the drawings 1 indicates the boxor cats ing, nsually of cover 2. 1 1 H The switch proper comprises insulating base 3, secured to the wall of the 'box,.the usual switch contact 4, knife switch blades 5, with cross-piece -6, fuses 15 and binding posts, all disposed in the usua manner.-

Centrally secured to the cross-piece 6 is the operating rod 7, which extends through the end wall of the inclosing casing and terminates in the handle 8, In order that the pull upon the cross-piece 6 in opening the switch may be in the general direction of the are through which said cross-piece must travel, the rod 7 must have an angular relation with respect to the longitudinal direction of the switch-blade,'when in closed position, as shown in Fig. 1, and to insure metal, and having hinged BURNS, a.

. illustrated in the drawings, this bearing or gulde 1s provided by an lear'or lug 9 proectm-g from the end wall'of the casing, said i I blades when in full open position and in this, I'provide a bearing or guide for 'the rod 7 in the end wall ofthe inclosing casing, at a point above the switch-blades. In the'particular embodiment of the invention lug having an aperture 10 through which the operating rod 7 passes. The end flange and end wall of the cover 2 are slotted at 11 and 12 respectively to permit the closing 4 of the cover without interference by the up- 1 Waard or angular projection of the operating ro n Inthe present instance as the box 1 is shallow, I have provided the cover 2 with an extension 14, forming a chamber of-suflicient depth to accommodate the switchthe present instance this chamber also receives the h1g9 projecting from the end wall I of the'box. It will be understood, however,

that in carrying out my invention, I do not confine myself to any particular form or shape of box or inclosing casing. It will also be apparent that with an inclosing cas-- ing of somewhat greater depth than the particular form illustrated, an independent ear or lug such as ,9 may be dispensed with as the end wall itself may be apertured to furnish a guide or bearing for the operating r0d7.' To permit the. operator to determine readily the full open position of the switch,

I may provide therod 7"- with any suitable -istop as, for example, the bend 13 adapted'to abut against the end wall of'the inclosure,

as shown in Fig. 2.

As ordinarily used, the box or casing will be secured .to a wallor other suitable sure face in vertical position, with the wall through which the/operating, rod projects servingas the bottom wall of the casing.

. There will thus be;.no'slots'or other openings in the casing through which dust may enter,

except for the small opening-at the bottom wallwhich being located underneath the box is in the least'expo'sed position. This is an important practical advantage.

'Iclaim: I. v 1. In an electric switch, a box, a switch mechanism within said box, a hinged'cover forming, with said box, a complete inclosing casing. for said switch mechanism, an oper-' v ating rod for said switch mechanism pro- 11D ejecting through said cover, said cover being! slottedtov permit the raising and lowering of the same.

2. In an electric switch, a box, switchmechanism within said box, arod secured at one end to said switch mechanism and at the opposite end projecting beyond a wall of said box, a guidefor said rod, said guide} projecting upwardly from. said wall, a hinged cover for said box having. a chamher into whichjs'aid guide. projects, a Wall of said cover. beingslotted tolpeijmit' the l opening andclosing of the: same.

3. An electric switch with] an inclosing" casing, a sw1tch mechanism}withinsaid casing, including a hinged; contact "imember' adapted, upon theopening of said. switch,

to swing toward 'axwallof said casing; an A operating rod-secured toIsaid'hinged contaot;

member and entending through said wall, .means on said wall for maintaining said rod ng, anoperating rod for said switch mechanlsm, said rod extending throughia wall of said casing, a lug on said wall forvsupporting said operating rod, a' stop on saidoper- 'ating rod arranged to cooperate with said lug for limiting the motion of the rod, and a hinged cover on the casing having a slot through which the operating rod extends, said slot permitting the opening and closing of thecover.

JAMES F. BURNS. 

